Receptacle and closure



Dec. 7, 1937. w. LOCKHART 3 RECEPTACLE AND CLOSURE Filed May 2, 1935INVENTORl ATTORNEYS Patented Dec. 7, 1937 UNITED STATES PATENT GFFICEBECEPTACLE AND CLOSURE Application May 2, 1935, Serial -No.- 19,440

7 Claims.

My invention is an improvement in metallic receptacles and closurestherefor and relates more particularly to a clamping ring for removablyclamping the cover on the receptacle in fluid tight 6 sealed relationthereto.

One of the objects of my invention is to removably clamp a cover upon areceptacle by providing a split contractible channeled clamping ring toengage the cover and receptacle and press the 10 same together in fluidtight sealed relation and means for contracting the ring to this end.

Another object is to provide means for contracting and/or expanding thering including one or more levers having slidable engagement with 15 thering ends and means positively connecting said levers where a pluralityare used, or connecting one lever and an end of the ring where a singlelever is employed.

A further object is to exert a lateral pressure against the cover flangeby said lever orlevers.

when they are operated to contract the ring and to thereby moreuniformly distribute the closing forces exerted by the ring on the coveraround the same.

Other objects are the simplicity of the device, its low cost ofmanufacture and its ease of operation. Other objects and advantages ofthe invention will become more apparent from the following descriptionof two embodimentsthereof, reference 30 being made to the accompanyingdrawing in which like reference characters are employed to designatelike parts throughout the same.

In the drawing: Figure 1 is a top planview of'bne embodiment 35 of myinvention shown applied in use;

Figure 2 is an enlarged section taken on line- 2--2 of Figure 1;

Figure 3 is a fragmentary plan view of the first embodiment of theinvention and shows the 40 parts in their respective positions when thering is fully contracted to seal the cover on the re- 'ceptacle in fluidtight relation; I

Figure 4 is a view similar to that shown in Figure 3, and shows thepositions of the parts when 45 the ring is expanded to remove it and thecover from the receptacle;

Figure '5 is an enlarged elevation looking in the direction of line 5-5of Figure 3; and,

Figure 6 is a view similar to that shown in 50 Figure 3 and illustratesa second embodiment of the invention in which but one lever is employed.

Referring now more particularly to the drawing, the barrel or drum isindicated at I. The

55 upper open end of the container is formed with a peripheral bead 2. Acover 3 comprising a cupped or depressed head, having a peripheralupwardly and outwardly extending flange 4, is supported by the head 2 insuch a manner that the cupped portion of the headorlcover may betelescoped 5 for a short distance within the open end of the drum, asillustrated in Figure 2. It will be noted that a portion of the flange 4is of substantially arcuate cross section to conform with theapproximate curvature of the upper surface of the bead. 10 A packing 5consistingv of an annulus of any suitable packing material, such asflexible rubber tubing or cork, is interposed between the flange 4 andthe head 2. v I ,v

According to the present invention, I have pro-, 18 vided an improvedmeans for removably securing the cover on the drum or receptacle toefiect a fluid tight seal therebetween by exerting a substantially,uniform and firm pressure along the cover flange and bead in adirection substantially 20 parallel to the longitudinal axis of thedrum.

Such means preferably includes a transversely split, channeled clampingring 6 of substantially U-shaped cross section and which is capable ofbeing expanded and contractedby suitable means. Inthe form illustratedthe upper and lower flange and bead engaging walls respectively of thering converge slightly toward the outer diameter of the ring and engagethe cover flange and bead .of the container to press the same togethertightly when the ring is contracted. However, it is to be understoodthat the ring and receptacle open end may be so designed that thecover-will be pressed into a tight seal with a shoulder formed at thereceptacle open end when the ring is expanded. That is, instead. of thereceptacle being formed with a rolled bead 2, the open end may be formedwith an annular shoulder and an annular channel for receiving anexpander type ring, a packing ring and the cover.

,By contracting the type of clamping ring herein illustrated, the coverflange will be pressed tightly against the packing -5 and the supportingbead 2 under a substantially vertical pressure.

Referring first to Figures 1 to 5 inclusive, I

have illustrated one embodiment of the invention in which the operatingmechanism includes a pair of levers having slidable pivotal connectionwith the ends of the ring or with brackets or lugs extending from theseends. The levers are also connected together by means voi! a link orridging member. o

More specifically, the ends ofthe ring 6 are provided with inwardlyextending lugs or brackets I and 8 respectively, welded thereto orformed 55.

integral therewith. The ring contracting and expanding levers 9 and II)are enlarged at their fulcrumed ends as at H and I2 and are slotted atl3 and I4 respectively to slidably receive bearing members or studs l5and it carried by the lugs or brackets l and 8 respectively. The studsmay be equipped with roller bearing sleeves (not shown) to minimizethefriction between them and the walls of the slots. It is to be noted thatthe slots are curved and may generally be arcuate in shape. Spiral,involute. or other curves may define the slots l3 and I4 if desired.

Thus the levers II and ii are slidably and pivotally connected to therespective lugs I and 8. The levers are also pivotally connectedtogether at I! and 18 by means of a bridging member [9. The member l9ispreferably a flat strip or metal and is upset at its ends 20 and II toprovide an intermediate oiIset portion. Z

The curved slots 13 and II extend inwardly from the inner ends of thelevers and traverse substantially the enlarged iulcrumed ends of thelevers, and while I have shown both the slots II and ll of substantiallythe same curvature, one of the slots may be formed along longer orshorter radii. In this manner the individual throws of the levers may bevaried. For instance, the radius of the slot ll may be longer than thatof the slot l3. Thus by first swinging the lever 9 to closed position asin Figure 3 a certain degree of contraction will-be imparted to the ringwhich may be suflicient to hold the cover in place for shipping the drumempty. But by Subsequently swinging the lever [0 to closed position, asin Figure 3, the longer radius of the slot ll will impart an evengreater degree of contraction to the ring sufiicient to press the coverand receptacle together in fluid tight sealed-relation. In theparticular embodiment shown, however, the slots are formed onsubstantially equal radii, but the radii are of suilicient length toimpart a fluid tight seal when both levers are moved to ring contractingposition.

The lever ends ll.and I! are provided with a cam-like bearing surface'22and 23 respectively for engagement with the upwardly extending portionof the cover flange 4 to exert an outward radial pressure thereagainstwhen the levers are moved to the position shown in Figure 3. Thisoutward pressure materially aids in properly seating the ring on thecover and receptacle by more uniformly distributing the closing forcesaround the ring as the ring is contracted.

In Figure 6 I have illustrated a modified embodiment of the invention inwhich a single lever 30 is employed. In this form of the invention thelever 30 is slidably and pivotally connected with one of the lugs 1 bymeans of the stud 3| carried by the lug and operating in the curved slot32 in the fulcrumed end of the lever. The lever is pivotally connectedwith the other end of the ring or'the lug 8 by means of a link 33pivoted to the lever at one end as at. 34, and at its other end to thelug 8, as at 35.

While I have described the illustrated embodiments of my invention insome particularity, obviously many others will readily occur to thoseskilled in this art, and I do not, therefore, limit myself to theprecise details shown and described but claim as my invention allembodiments, variations and modifications thereof coming within thescope of the appended claims.

I claim:

l. A device for removably clamping a cover on the open end of a metallicreceptacle including a.

split locking ring having portions engaging the cover and the receptacleto press the same together when the ring is contracted, lugs extendinginwardly from the ends of the ring defining the split and means forcontracting and/or expanding the ring, said means, including a lever,having an arcuate bearing formed therein near one end, a member carriedby one of said lugs and having a driving connection with said leverthrough the bearing, and a toggle pivotally connected with said leverand said other mg.

2. A device for removably clamping a cover on the open end of a metallicreceptacle including a split loci-ringv ring having portions engagingthe cover and the receptacle to press the same together when the ring iscontracted, lugs extending inwardly from the ends of the ring definingthe split and means for contracting and/or expanding the ring includinglevers slidably carried by said lugs, one of said levers having a slotformed therein for slidably receiving a stud, a stud on one of said lugsand operating in said slot, and a toggle pivotally connecting saidlevers.

3. A device for removably clamping a cover on the open end of ametallicreceptacle including a, split locking ring having portionsengaging the cover and the receptacle to press the same together whenthe ring is contracted, lugs extending inwardly from the ends of thering defining, the split .and means ior contracting and/or expanding thering including a lever, a stud in-one of said lugs, said lever having aclosed slot formed therein for receiving said stud whereby to permit alimited relative sliding driving connection between the said one lug andsaid lever, and a toggle pivotally connecting said lever with said otherlug.

4'. A device for removably clamping a cover on the open end of ametallic receptacle including a split locking ring having portionsengaging the cover and the receptacle to press the same together whenthe ring is contracted, lugs extending inwardly from the ends 0! thering defining the split and means for contracting and/or expanding thering including a lever carried by one of said lugs and having a slidablepivotal connection with said lug whereby the fulcrum of said lever maybe shifted, and means cooperating with saidlever and the other of saidlugs for effecting contraction and/or expansion of said ring, said leverhaving engagement with said cover to impart an outward radial pressureagainst the cover when the ring is contracted.

5. A device for removably clamping a cover on the open end of a metallicreceptacle including a split locking ring having portions engaging thecover and the receptacle to press the same together when thering iscontracted, lugs extending inwardly from the ends of the ring definingthe split and means for contracting and/or expanding the ring includinglevers slidably carried by said lugs and-a toggle pivotally connectingsaid levers, one of said levers having a portion.

engaging with said cover to impart an outward pressure against the coverwhen the ring is contracted.

6. A device for removably clamping a cover on the open end of a metallicreceptacle including a split locking ring having portions engaging thecover andthe receptacle to press the same together when the ring iscontracted, lugs extending inwardly from the ends oi. the ring definingthe split and means for contracting and/or expanding the ring includinglevers slidably carried by said lugs, one oi said levers having a sloti'ormed therein for slidably receiving a stud, a. stud on one of saidlugs and operating in said slot, and toggle means pivotally connectingsaid levers, one of said levers having a portion for engagement withsaid cover to impart an outward pressure against the cover when the ringis contracted.

7. A device for removably clamping a cover on m the open end of ametallic receptacle including .3 a split locking ring having portionsengaging the cover and the receptacle to press the same'together whenthe ring is contracted, lugs extending inwardly from the-ends of thering defining the split and means for contracting and/or expanding thering including levers slidably carried by each of said lugs and meanscooperating with each of said levers for effecting contraction and/orexpansion of said ring.

WILLIAM LOCKHAR'I'.

